CN113912373B - High-performance curing agent for quickly curing soft soil with high water content into roadbed filler - Google Patents

High-performance curing agent for quickly curing soft soil with high water content into roadbed filler Download PDF

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CN113912373B
CN113912373B CN202111389662.9A CN202111389662A CN113912373B CN 113912373 B CN113912373 B CN 113912373B CN 202111389662 A CN202111389662 A CN 202111389662A CN 113912373 B CN113912373 B CN 113912373B
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curing
soft soil
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water
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CN113912373A (en
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李吴刚
张聪
鲍世辉
刘文化
蔡景明
张勇
鲁晓源
张建
王喆
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Wuxi Churu Enterprise Management Partnership LP
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Nasitong Wuxi Technology Development Co ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/30Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
    • C04B28/32Magnesium oxychloride cements, e.g. Sorel cement
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00732Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075Uses not provided for elsewhere in C04B2111/00 for road construction
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The invention relates to the technical field of soft soil curing, in particular to a high-performance curing agent for quickly curing soft soil with high water content into roadbed filler. The raw materials comprise metakaolin, magnesium oxide, magnesium chloride, sodium silicate, sodium bicarbonate, sodium polyacrylate, sulfated castor oil, aluminum oxide, ferric chloride, aluminum chloride, silica fume and water. The curing material provided by the invention has the most remarkable advantages that under the condition that the high-water-content soft soil is not pretreated, the 24-hour compressive strength can stably reach 6MPa after normal-temperature curing, and the water stability coefficient reaches more than 87%; the 28d unconfined compressive strength can reach more than 10MPa, the water stability coefficient can reach more than 97 percent, the use requirement of curing the soft soil with high water content can be completely met, the construction period can be obviously shortened, and the method has obvious social and economic benefits.

Description

High-performance curing agent for quickly curing high-water-content soft soil into roadbed filler
Technical Field
The invention relates to the technical field of soft soil curing, in particular to a high-performance curing agent for quickly curing soft soil with high water content into roadbed filler.
Background
A great deal of dredged sludge is generated in the process of dredging the urban lakes and rivers. Dredged sludge has the characteristics of high water content, low strength and the like, and the problems of environmental pollution and the like are easily caused by improper disposal. The harmless treatment and resource utilization of the sludge become problems to be solved urgently.
The sludge solidification is one of the main technologies for realizing the recycling, reduction and reutilization. The treated solidified sludge can be used as a filling material for resource utilization. Curing the material is a key technology to achieve this technology. At present, cement, quicklime and the like are widely applied to engineering, and although certain engineering requirements can be met, the production of the cement and the quicklime has the defects of high energy consumption and high pollution, and is not beneficial to sustainable development, energy conservation and emission reduction. In order to solve the defects of the solidification method, many methods for solidifying the sludge have been studied, but most methods cannot be directly used for soft soil with high water content, and when the soft soil with the water content much higher than the optimal water content is treated, particularly the soft soil close to the liquid limit, the soft soil needs to be aired in advance so that the water content of the soil is controlled to be about the optimal water content.
Aiming at the limitations of the materials, the construction process and the method, some curing agents suitable for the soft soil with high water content exist, but the following problems also exist: the main components of the cement are sulphoaluminate cement clinker, gypsum, lime and ordinary portland cement, and the technical problem of poor soil and water stability of the cement is not solved. Secondly, cement is used as a cementing material among the soil particles, the unconfined compressive strength of 3d and 7d is only about 0.5MPa and 1.5MPa, and the cement can only be used as a common filling material and cannot meet higher use requirements. Thirdly, alkaline residue, mineral powder, super absorbent resin and water glass are used as main raw materials, the doping amount of the alkaline residue and the doping amount of the mineral powder respectively reach 30-50% and 10-25% of the dry soil mass, the too high doping amount limits the engineering application of the method, the alkaline residue and the mineral powder are used as raw materials, the early strength is slowly increased, the 7d unconfined compressive strength is increased to 0.37MPa under the condition that the doping amount of the alkaline residue is 50% and the solidifying material is 20% of the mineral powder, and the rapid solidification requirement on engineering cannot be met.
As can be seen from the above, various curing methods are not ideal in curing soft soil with high water content, and therefore, a high-performance curing material which can be better applied to soft soil with high water content is still needed.
Disclosure of Invention
Based on the content, the invention provides the high-performance curing agent for quickly curing the soft soil with high water content into the roadbed filler, and the technical problems of low strength, slow strength increase, poor water stability and the like of the existing curing material are overcome.
One of the technical schemes of the invention is a high-performance curing agent for quickly curing soft soil with high water content into roadbed filler, which comprises the following raw materials in parts by mass: 10-15 parts of metakaolin, 12-16 parts of magnesium oxide, 5-7 parts of magnesium chloride, 5-8 parts of sodium silicate, 4-6 parts of sodium bicarbonate, 0.3-0.8 part of sodium polyacrylate, 1-3 parts of sulfated castor oil, 0.03-0.09 part of aluminum oxide, 1-2 parts of ferric chloride, 1-2 parts of aluminum chloride, 2-4 parts of silica fume and 2-5 parts of water.
Further, the metakaolin has an average particle size of 5-20um and a specific surface area of not less than 600m2The magnesium oxide is active magnesium oxide, the sodium silicate is powder, the modulus is 1, and the particle size of the sodium polyacrylate is less than 0.075 mm.
According to the second technical scheme, the preparation method of the high-performance curing agent for quickly curing the soft soil with the high water content into the roadbed filler comprises the following steps:
mixing and stirring sulfated castor oil, metakaolin, silica fume, magnesium chloride, aluminum oxide, ferric chloride, aluminum chloride and water to obtain a material A;
adding the material A into sodium polyacrylate and uniformly mixing to obtain a material B;
mixing and stirring magnesium oxide, sodium silicate and sodium bicarbonate to obtain a material C;
and stirring and uniformly mixing the material B and the material C to obtain the high-performance curing agent for quickly curing the soft soil with the high water content into the roadbed filler.
Further, in the preparation process of the material A, mixing and stirring are carried out under the ultrasonic condition for 45 min; in the preparation process of the material C, mixing and stirring are carried out for 30 min; and stirring and uniformly mixing the material B and the material C for 10 min.
According to the third technical scheme, the high-performance curing agent for quickly curing the soft soil with the high water content into the roadbed filler is applied to curing the soft soil.
Further, the soft soil is sludge with the water content of 10-80%.
According to the fourth technical scheme, the soft soil curing method is characterized in that the high-performance curing agent for quickly curing the high-water-content soft soil into the roadbed filler and the soft soil are mixed according to the mass ratio of 5-15:100 and then cured to realize the curing of the soft soil.
Further, the soft soil is sludge with the water content of 10-80%, and the curing condition is 18-25 ℃ and the relative humidity is more than or equal to 95%.
Compared with the prior art, the invention has the beneficial effects that:
aiming at the physical and mechanical properties of the soft soil with high water content, the basic principle of realizing the solidification of the soft soil is to reduce the water content in the soil and improve the bonding strength among soil particles. To achieve the purpose, the invention is optimized and innovated from the following aspects:
firstly, magnesium chloride, ferric chloride, aluminum chloride and sulfated castor oil in the solidified material can ionize positive cations in water, the cations are subjected to ion exchange with the cations adsorbed on the surfaces of soil particles, the thickness of a diffusion electric double layer on the surfaces of the soil particles is reduced, so that the repulsive force and the attractive force between the soil particles are reduced, the soil particles are promoted to approach each other and aggregate to form larger particles, and the compactness of the soil is improved.
Secondly, after the hydrophobic groups in the sulfated castor oil are adsorbed on the surface of soil particles, the soil can be modified from hydrophilic materials into hydrophobic materials, and the water stability of the cured material can be improved. And because the thickness of the diffusion double-electrode layer of the soil particles is reduced, part of the bound water originally adsorbed by the soil particles is changed into free water. Carbon dioxide released by the decomposition reaction of sodium bicarbonate increases the pore gas pressure in the soil, part of free water can be easily discharged in the hydrophobic material, and part of free water is absorbed by sodium polyacrylate;
finally, in order to realize the purposes of early strength, high strength and high water stability of the curing material, metakaolin, magnesium oxide, magnesium chloride, sodium silicate, sodium bicarbonate, aluminum oxide, ferric chloride, aluminum chloride and silica fume are introduced. Active magnesium oxide, water and carbon dioxide are subjected to carbonization reaction to generate expansive substances such as hydromagnesite, brucite and the like, the pores among the soil particles can be filled while the soil particles are cemented and connected, and the pores among the soil particles and the pores in the soil agglomerate particles are compacted, so that the carbonization reaction of the magnesium oxide is quicker, the early-age strength of the curing material can be obviously improved, and the curing material has the characteristic of early strength. Meanwhile, 5-phase crystals or 3-phase crystals generated by the reaction of magnesium oxide, magnesium chloride and water can effectively bond sludge particles and form a strong-bonding net-shaped framework, so that the later strength of the cured material can be obviously improved. In order to solve the problem that the water stability of 5-phase crystals or 3-phase crystals generated by the reaction of magnesium oxide, magnesium chloride and water is insufficient, metakaolin, sodium silicate and aluminum oxide are further introduced as raw materials, the metakaolin, the sodium silicate and the aluminum oxide are subjected to polymerization reaction with silicon-aluminum oxide in soft soil under an alkaline condition to generate a geopolymer gelled material with a three-dimensional network structure, reaction products are wrapped on the outer walls of the 5-phase crystals and the 3-phase crystals to generate a high polymer hydrophobic protective layer to block the contact between the 5-phase crystals and the 3-phase crystals and water, the water stability of the solidified material is improved, and the later strength of the solidified material can be further improved, which is an important reason for introducing the geopolymer. Based on the technical principle, the curing agent prepared by the invention has the characteristics of high early strength, high water stability and the like after the soft soil with high water content is cured.
The curing material provided by the invention has the most remarkable advantages that under the condition that the high-water-content soft soil is not pretreated, the 24-hour compressive strength can stably reach 6MPa after normal-temperature curing, and the water stability coefficient reaches more than 87%; the 28d unconfined compressive strength can reach more than 10MPa, the water stability coefficient can reach more than 97 percent, the use requirement of curing the soft soil with high water content can be completely met, the construction period can be obviously shortened, and the method has obvious social and economic benefits.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
In the following examples of the present invention, the raw materials used are all commercially available products, specifically: the metakaolin has an average particle diameter of 5-20um and a specific surface area of not less than 600m2Per kg, active magnesium oxide with the active content not less than 60 percent, sodium silicate powder with the modulus of 1, and sodium polyacrylate particles with the particle size of less than 0.075 mm;
examples 1 to 3
The raw materials are proportioned in parts by weight and shown in the table 1;
TABLE 1 raw material ratios of examples 1-3
Figure BDA0003368161090000051
The preparation method comprises the following steps: the raw materials were weighed out accurately according to the mix ratios shown in table 1. Firstly, sulfated castor oil, metakaolin, silica fume, magnesium chloride, aluminum oxide, ferric chloride, aluminum chloride and water are mixed and ultrasonically stirred for 45min to obtain a material A. And secondly, adding the sodium polyacrylate into the material A, and uniformly mixing to obtain a material B. And mixing and uniformly stirring the magnesium oxide, the sodium silicate and the sodium bicarbonate for 30min to obtain a material C. And finally, mixing the material B and the material C, and uniformly stirring for 10min to obtain the materials of each group of embodiments.
The cured materials prepared in the examples 1-3 are respectively mixed with sludge with the water content of 65% according to the mass ratio of 5:100, the mixture is poured into a three-segment saturator after being uniformly stirred, cylindrical samples with the diameter (39.1mm) multiplied by the height (80mm) are prepared, the cylindrical samples are placed in a standard curing box for curing (the temperature is 20 +/-1 ℃ and the relative humidity is more than or equal to 95%) to the corresponding age, the compressive strength of the samples is measured according to GB/T50123 + 2019 soil engineering test method Standard, and the detection results are shown in Table 2.
TABLE 2 unconfined compressive strength and water stability coefficient test results for examples 1-3
Figure BDA0003368161090000052
Figure BDA0003368161090000061
The test result shows that: the curing agents prepared by the three mixing ratios given in the embodiment have a good curing effect on sludge, and the unconfined compressive strength of the curing agents for 24 hours exceeds 6.8MPa and can reach 7.3MPa to the maximum; the water stability coefficients are all over 87.2 percent and can reach 89.2 percent at most. Meanwhile, the curing agents prepared according to the three mixing ratios given in the embodiment have higher later strength, and 28d unconfined compressive strength of the curing agents exceeds 10.7MPa and can reach 11.8MPa to the maximum; the water stability coefficients are all over 97.7 percent and can reach 98.4 percent at most. Therefore, the curing material disclosed by the invention completely meets the use requirement of curing soft soil.
Comparative example 1
The difference is that 3 parts of sulfated castor oil, 0.5 part of sodium polyacrylate and 5 parts of water are weighed in parts by mass; firstly, sulfated castor oil, sodium polyacrylate and water are mixed and uniformly stirred for 30min to obtain the material of the comparative example 1. According to GB/T50123 and 2019 geotechnical test method Standard, the compressive strength of the test sample is measured, and the detection results are shown in Table 3:
TABLE 3 unconfined compressive strength and water stability coefficient test results for comparative example 1
Figure BDA0003368161090000062
The test result shows that: the unconfined compressive strength and the water stability coefficient of the cured material shown in the comparative example 1 can not meet the use requirements of cured soft soil.
Comparative example 2
The difference is that 10 parts of metakaolin, 5 parts of sodium silicate, 3 parts of sulfated castor oil, 0.5 part of sodium polyacrylate, 0.09 part of aluminum oxide, 4 parts of silica fume and 5 parts of water are weighed according to parts by mass;
firstly, sulfated castor oil, metakaolin, silica fume, aluminum oxide and water are mixed and ultrasonically stirred for 45min to obtain a material A, and sodium polyacrylate is added into the material A and uniformly stirred to obtain a material B. And finally, adding sodium silicate into the material B, mixing and uniformly stirring for 10min to obtain the material in the comparative example 2. The performance of the test sample is determined according to GB/T50123-2019 geotechnical test method Standard, and the detection results are shown in Table 4:
TABLE 4 unconfined compressive strength and water stability coefficient test results for comparative example 2
Figure BDA0003368161090000071
The test result shows that: the unconfined compressive strength of the cured material shown in comparative example 2 was greatly reduced, failing to meet the use requirements.
Comparative example 3
The difference is that 16 parts of magnesium oxide, 7 parts of magnesium chloride, 6 parts of sodium bicarbonate, 0.5 part of sodium polyacrylate, 3 parts of sulfated castor oil, 2 parts of ferric chloride, 2 parts of aluminum chloride and 5 parts of water are weighed according to the parts by mass;
firstly, sulfated castor oil, magnesium chloride, ferric chloride, aluminum chloride and water are mixed and stirred ultrasonically for 45min to obtain a material A. And adding sodium polyacrylate into the material A, and uniformly mixing to obtain a material B. And mixing the magnesium oxide and the sodium bicarbonate, and uniformly stirring for 30min to obtain a material C. And mixing the material B and the material C, and uniformly stirring for 10min to obtain the material of the comparative example 3. The performance of the test samples is measured according to GB/T50123 and 2019 geotechnical test method Standard, and the detection results are shown in Table 5:
TABLE 5 unconfined compressive strength and water stability coefficient test results for comparative example 3
Figure BDA0003368161090000072
The test result shows that: the water stability of the cured material shown in comparative example 3 is drastically reduced, and the unconfined compressive strengths of 24h, 7d and 28d in comparative example 3 are all reduced compared to those in the examples, so that the use requirement of cured soft soil cannot be satisfied.
Comparative example 4
The difference from example 3 is that the raw materials of magnesia and alumina are omitted.
The performance of the test samples is measured according to GB/T50123-2019 geotechnical test method Standard, and the detection results are shown in Table 6:
TABLE 6 unconfined compressive strength and water stability coefficient test results for comparative example 4
Figure BDA0003368161090000081
The test result shows that: the unconfined compressive strengths of 24h, 7d and 28d in comparative example 4 and the water stability were all decreased compared to those in the examples.
Comparative example 5
The difference from example 3 is that magnesium chloride, ferric chloride and aluminum chloride are omitted.
The performance of the test samples is measured according to GB/T50123-2019 geotechnical test method Standard, and the detection results are shown in Table 7:
TABLE 7 unconfined compressive strength and water stability coefficient test results for comparative example 5
Figure BDA0003368161090000082
The test result shows that: the unconfined compressive strengths of 24h, 7d and 28d in comparative example 5 were reduced more significantly than those in the examples.
Comparative example 6
The difference from example 3 is that alumina and aluminum chloride are omitted
The performance of the test samples is measured according to GB/T50123 and 2019 geotechnical test method Standard, and the detection results are shown in Table 8:
TABLE 8 unconfined compressive strength and water stability coefficient test results for comparative example 6
Figure BDA0003368161090000083
The test result shows that: the unconfined compressive strength and water stability for 24h in comparative example 6 were closer to those in the examples, but both the unconfined compressive strength and water stability of 7d and 28d were reduced.
Comparative example 7
The same as example 3 except that metakaolin, sodium silicate and alumina were omitted
The performance of the test samples is determined according to GB/T50123 and 2019 geotechnical test method Standard, and the detection results are shown in Table 9:
TABLE 9 unconfined compressive strength and water stability coefficient test results for comparative example 7
Figure BDA0003368161090000091
The test result shows that: in comparative example 7, the unconfined compressive strengths of 7d and 28d were both reduced compared to those in the examples, and in addition, the water stability coefficients of 7d and 28d were not increased.
Comparative example 8
The difference from example 3 is that the starting material sodium bicarbonate was omitted.
The performance of the test samples was determined according to GB/T50123 and 2019 geotechnical test method Standard, and the test results are shown in Table 10:
TABLE 10 unconfined compressive strength and water stability coefficient test results for comparative example 8
Figure BDA0003368161090000092
The test result shows that: in comparative example 8, the unconfined compressive strength and water stability factor for 24h were significantly reduced as compared to those in the examples, and in addition, the unconfined compressive strength and water stability factor for 7d and 28d were also reduced.
Comparative example 9
The difference from example 3 is that sulfated castor oil is omitted.
The performance of the test samples was determined according to GB/T50123 and 2019 geotechnical test method Standard, and the test results are shown in Table 11:
TABLE 11 unconfined compressive strength and water stability coefficient test results for comparative example 9
Figure BDA0003368161090000101
The test result shows that: the water stability factor of 24h, 7d and 28d in comparative example 9 was greatly decreased, and further the unconfined compressive strength of 24h, 7d and 28d was also decreased.
Example 4
The difference from example 3 is that the cured material prepared in example 3 is mixed with sludge with a water content of 80% according to a mass ratio of 15:100, and the compressive strength of the sample is measured according to GB/T50123-.
TABLE 12
Figure BDA0003368161090000102
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.

Claims (4)

1. The high-performance curing agent for quickly curing the soft soil with high water content into the roadbed filler is characterized by comprising the following raw materials in parts by mass: 10-15 parts of metakaolin, 12-16 parts of magnesium oxide, 5-7 parts of magnesium chloride, 5-8 parts of sodium silicate, 4-6 parts of sodium bicarbonate, 0.3-0.8 part of sodium polyacrylate, 1-3 parts of sulfated castor oil, 0.03-0.09 part of aluminum oxide, 1-2 parts of ferric chloride, 1-2 parts of aluminum chloride, 2-4 parts of silica fume and 2-5 parts of water;
the soft soil is sludge with the water content of 10-80%;
the method for solidifying the soft soil by adopting the high-performance solidifying agent comprises the following steps: mixing the high-performance curing agent and the soft soil according to the mass ratio of 5-15:100, and curing to realize the curing of the soft soil;
the preparation method of the high-performance curing agent for quickly curing the soft soil with high water content into the roadbed filler comprises the following steps:
mixing and stirring sulfated castor oil, metakaolin, silica fume, magnesium chloride, aluminum oxide, ferric chloride, aluminum chloride and water to obtain a material A;
adding the material A into sodium polyacrylate and uniformly mixing to obtain a material B;
mixing magnesium oxide, sodium silicate and sodium bicarbonate to obtain a material C;
and stirring and uniformly mixing the material B and the material C to obtain the high-performance curing agent for quickly curing the soft soil with the high water content into the roadbed filler.
2. The high-performance curing agent for the rapid curing of the soft soil with high water content into the roadbed filler according to claim 1, wherein the metakaolin has an average particle size of 5-20um and a specific surface area of not less than 600m2The magnesium oxide is active magnesium oxide, the sodium silicate is powder, the modulus is 1, and the particle size of the sodium polyacrylate is less than 0.075 mm.
3. The use of the high-performance curing agent for the rapid curing of the high-moisture-content soft soil according to any one of claims 1-2 into roadbed fillers in the curing of soft soil.
4. A soft soil curing method is characterized in that the high-water-content soft soil of any one of claims 1 to 2 is rapidly cured into a high-performance curing agent of roadbed filler and soft soil, and the curing is carried out after the high-performance curing agent and the soft soil are mixed according to the mass ratio of 5-15: 100; the curing condition is 18-25 ℃, and the relative humidity is more than or equal to 95%.
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CN111675483B (en) * 2020-06-24 2022-03-29 深圳大学 Slurry flocculation curing agent and preparation method and application thereof
CN113666588A (en) * 2021-07-26 2021-11-19 江苏省科佳工程设计有限公司 Method for curing high-water-content slurry
CN113429151B (en) * 2021-08-27 2021-11-02 中鼎长信(山东)工程科技有限公司 Curing agent for cement or soft soil and roadbed material formed by curing agent

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